On Wed 27-06-18 07:31:25, Paul E. McKenney wrote: > On Wed, Jun 27, 2018 at 09:22:07AM +0200, Michal Hocko wrote: > > On Tue 26-06-18 10:03:45, Paul E. McKenney wrote: > > [...] > > > 3. Something else? > > > > How hard it would be to use a different API than oom notifiers? E.g. a > > shrinker which just kicks all the pending callbacks if the reclaim > > priority reaches low values (e.g. 0)? > > Beats me. What is a shrinker? ;-)
This is a generich mechanism to reclaim memory that is not on standard LRU lists. Lwn.net surely has some nice coverage (e.g. https://lwn.net/Articles/548092/). > More seriously, could you please point me at an exemplary shrinker > use case so I can see what is involved? Well, I am not really sure what is the objective of the oom notifier to point you to the right direction. IIUC you just want to kick callbacks to be handled sooner under a heavy memory pressure, right? How is that achieved? Kick a worker? -- Michal Hocko SUSE Labs
